摘要
采用二阶类Kuramoto模型对电网进行合理建模,分别应用临界同步耦合强度和平均同步误差来描述电网的同步能力和鲁棒性.研究发现,发电机的功率分配对线路的传输功率影响较大,而电网中高负荷线路越多,网络越难同步.基于这一发现,首先在发电机功率均匀分配(EG)方式下,计算出每条线路的传输功率,然后基于潮流追踪算法提出一种发电机功率非均匀分配(TG)方式,即在发电总量不变的情况下,增大枢纽发电机节点的功率,减小边缘发电机节点的功率.该发电机功率分配策略可以在一定程度上降低网络的临界同步耦合强度,减小平均同步误差,改善电网的同步性能和鲁棒性.
Kuramoto-like model is adopted to model a power grid reasonably.And critical synchronization coupling strength and average synchronization error are used to describe synchronization ability and robustness of a power grid,respectively.It is found that power distribution of generators has a great influence on transmission power of lines,and the more high-load lines in power grid,the more difficult the network synchronization.Based on the discovery,we calculate transmission power of each line under uniform power distribution method of generators(EG mode).Then,based on a power flow tracking algorithm,an non-uniform power distribution method(TG mode)of the generators is further proposed.With this method,as the total amount of power generated is given,power of the hub generator node is increased and power of the edge generator node is reduced.It shows that the new power distribution strategy reduces effectively critical synchronization coupling strength and average synchronization error.Thus the method improves synchronization performance and robustness of a power grid.
作者
邹艳丽
高正
梁明月
李志慧
何铭
ZOU Yanli;GAO Zheng;LIANG Mingyue;LI Zhihui;HE Ming(College of Electronic Engineering,Guangxi Normal University,Guilin,Guangxi 541004,China)
出处
《计算物理》
EI
CSCD
北大核心
2020年第5期623-630,共8页
Chinese Journal of Computational Physics
基金
国家自然科学基金(11562003)
广西多源信息挖掘与安全重点实验室系统性研究课题基金(13-A-02-03)资助项目
关键词
同步
鲁棒性
电网
潮流追踪
synchronization
robustness
power grids
power tracing
